Abstract:Effects of ethephon, 1-aminocyclopropane-1-carboxylic acid (ACC), aminioxyacetic acid (AOA) and AgNO3 on adventitious rooting in mung bean hypocotyl cuttings were studied. Results indicated that ethephon and ACC promoted adventitious root formation in mung bean hypocotyl cuttings, the optimal concentrations being 50 μmol/L and 10 μmol/L respectively, whereas AOA and AgNO3 significantly inhibited adventitious rooting, and the effect of which were dose-dependent. The promoting effect of ACC and the inhibitory effect of AOA on the cutings excised after 24 hours were sensitive．The rooting efects were best in treatment with 10 μmol/L ACC for 0-6 hours an d 18-24 hours， and in treatment with 50 μmol/L ethephon for 0-2 hours and 22-24 hours．It is concluded that the promoting efects of ethephon and ACC on adventitious rooting were at induction stage and late initial stage．